A Topological Analysis of the Top Quark Signal and
Background at Hadron Colliders
R. D. Field, Y. Kanev, and M. Tayebnejad
Institute for Fundamental Theory, Department of Physics,
University of Florida, Gainesville, FL 32611
Phys. Rev. D55, 5685 (1997).
We investigate the event topology of the
decay mode of top-pair
production in proton-antiproton collisions at 1.8 TeV. Neural networks and Fisher
discriminates are used in conjunction with modified Fox-Wolfram "shape" variables to help
distinguish the top-pair signal from the W+jets and b+jets background. Instead of
requiring at least four jets in the event, we employ a cut on the number of calorimeter cells
with transverse energy greater than some minimum. By combining these cell cuts with the event
shape information, we are able to obtain a signal to background ratio of around 9
(for an ideal detector), without tagging b-quarks. B-quark tagging would, of course,
further enhance the signal to background ratio.
(Click for entire paper.)
This research was supported in part by a
grant from the U.S. Department of Energy
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